80-90 degrees warm water is enough, because soybean milk powder washed with boiling water is easy to agglomerate, while soybean milk powder washed with warm water is not easy to agglomerate, so soybean milk powder is washed with warm water.

Although soybean milk powder can be washed out with warm water, it should be noted that the water should still be boiled to 100 degrees, and then cooled to 80~90 degrees before washing.